The first figure gives spring force Fx versus position x for the spring-block arrangement of the second figure. The scale is set by F, = 160 N. We release the block at x = 13.0 cm. How much work does the spring do on the block when the block moves from x; = +9.0 cm to (a) x = +5.0 cm, (b) x = -5.0 cm, (c) x = -9.0 cm, and (d) x = -10.0 cm?

A single conservative force acts on the a 5.0 kg object.  The equation Fx = 2x + 4 describes the force, where x is in meters.  As the object moves along the x axis from x = 1.0 m to x = 5.0 m calculate the work done by this force.

A 1200-kg sports car is advertised to accelerate from 0-100 km/h (27.78 m/s) in 3.00 s. What is the power output of the car in hp? 1 hp = 746 W 01 207 hp 325 hp 200 hp 175 hp

The force required to compress a non-standard spring as a function of displacement is given by the equationF(x) = -Asin(bx) + kx,where A = 25 N, b = 11 rad/m, and k = 68 N/m. Enter a general equation in terms of the given variables for the work required to compress this spring from position x1 to x2.  Calculate the work done in joules as the spring is compressed from x = 0 to x1 = 21 cm.   Calculate the work done in joules as the spring is compressed from x1 = 21 cm to x2 = 66 cm

In the arrangement of the first figure, we gradually pull the block from x = 0 to x = +3.0 cm, where it is stationary. The second figure gives the work that our force does on the block. The scale of the figure's vertical axis is set by Ws = 1.0 J. We then pull the block out to x = +6.0 cm and release it from rest. How much work does the spring do on the block when the block moves from xi = +6.0 cm to (a) x = +4.0 cm, (b) x = -1.0 cm, and (c) x = -6.0 cm?

A cheerleader lifts his 68 kg partner straight up off the ground a distance of 0.72 m before releasing her. Assume the partner’s velocity is zero at the beginning and the end of the lift. The acceleration of gravity is 9.8 m/s2 . If he does this 22 times, how much work has he done? Answer in units of J.

A spring with a spring constant of 18.0 N/cm has a cage attached to its free end. (a) How much work does the spring force do on the cage when the spring is stretched from its relaxed length by 7.60 mm? (b) How much additional work is done by the spring force when the spring is stretched by an additional 7.60 mm?

A force of 45.6 lb is used to push a box 10.3 ft across a level floor. (a) How much work was done on the box? (b) What is the change of potential energy as a result of this move? (a) W = x 102 ft·lb %3D (b) PE = ft lb %3D

The spring-flex exercise system consists of a spring with one end fixed and a handle on the other end. The idea is that you exercise your muscles by stretching the spring from its natural length, which is 38 cm. If a 170 Newton force is required to keep the spring stretched to a length of 52 cm, how much work is required to stretch it from 51 cm to 70 cm? Your answer must include the correct units. Work =

The force required to compress a non-standard spring varies as the spring is compressed, as shown by the plot of force vs displacement. Distances are x1 = 10, x2 = 25 cm, x3 = 55 cm, and x4=75cm, and the forces are F1 = 110 N and F2 = -60N. Calculate the work done in Joules, on the spring as it is compressed from origin to point x4.